Process for production of varistor material

Details Process for production of varistor material Process for production of varistor material

1989-06-14

1991-12-31

Barr, Josephine

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

252518, 264 66, 419 23, 419 38, 419 53, C04B 3334, H01B 106

Patent

active

050769790

ABSTRACT:
A process for the production of a varistor material having a nonlinear index (.alpha.) of at least 20, which comprises adding a manganese compound to zinc oxide; heating the obtained mixture in the form of a powder in the atomosphere at 1050.degree. to 1150.degree. C.; grinding the material to give a particle size of 150 mesh or below; molding the powder into a desired shape; and sintering the same at 1200.degree. to 1350.degree. C.; is disclosed.

REFERENCES:
patent: 5039452 (1991-08-01), Thompson et al.
patent: 5039971 (1991-08-01), Imai et al.
Chemical Abstracts, vol. 85, No. 12 (9/20/76), p. 571, Abstract No. 86214n, Columbus, Ohio.
Chemical Abstracts, vol. 84, No. 12, (3/22/76), p. 655, Abstract No. 83245s, Columbus, Ohio.

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